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公开(公告)号：US20250141641A1
公开(公告)日：2025-05-01
申请号：US19009357
申请日：2025-01-03
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM , Qifan CHEN
Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.
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公开(公告)号：US20250088398A1
公开(公告)日：2025-03-13
申请号：US18957647
申请日：2024-11-22
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM , Jialing Li CHEN
Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to packet designs and numerologies that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a wireless communication device may up-clock a physical layer (PHY) convergence protocol (PLCP) protocol data unit (PPDU) for transmission on carrier frequencies above 7 GHz, where the PPDU conforms to an existing PPDU format associated with carrier frequencies below 7 GHz. As used herein, the term “up-clocking” refers to increasing the frequency of a clock signal used to convert the PPDU between the frequency domain and the time domain. In some aspects, the up-clocking may result in a subcarrier spacing (SCS) greater than or equal to 1.2 MHz, where the SCS represents a spacing between the subcarriers on which a PHY preamble of the PPDU is modulated.
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公开(公告)号：US20240298374A1
公开(公告)日：2024-09-05
申请号：US18633342
申请日：2024-04-11
Applicant: QUALCOMM Incorporated
Inventor： Abhishek Pramod PATIL , Alfred ASTERJADHI , Youhan KIM , George CHERIAN
CPC classification number: H04W76/15 , H04W52/0216 , H04W52/0219 , H04W74/006 , H04W76/40 , H04W84/12
Abstract: Methods, systems, and devices for wireless communication are described. The described techniques relate to improved methods, systems, devices, or apparatuses that support a 20 MHz station (STA) parked on a secondary channel. Without the described techniques, mechanisms to support secondary channel operation may be unable to receive management frames or broadcast traffic from an access point (AP), which may cause the STA to lose synchronization with the AP, miss a channel change or other critical announcement from the AP, etc. Considerations for providing such information to STAs parked on a secondary channel are discussed. In some examples, an AP may restrict resource unit allocation to the secondary channel on which the STA is parked. In some cases, a trigger-based random access mechanism may utilize aspects of the present disclosure to limit access to certain resource units to STAs on a given secondary channel.
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公开(公告)号：US20240259243A1
公开(公告)日：2024-08-01
申请号：US18532755
申请日：2023-12-07
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM
CPC classification number: H04L27/2603 , H04L1/0068 , H04L5/0048 , H04L5/0094 , H04L27/2613
Abstract: This disclosure provides methods, devices and systems that support communicating using orthogonal frequency division multiple access (OFDMA) according to a tone plan that supports 20 MHz subchannel puncturing within a wireless channel. In some aspects, a non-legacy tone plan may define a set of tones for a resource unit (RU) such that the RU does not overlap a 20 MHz subchannel boundary of the wireless channel. The locations of the set of tones in the non-legacy tone plan may be shifted relative to corresponding tones associated with a corresponding RU according to a legacy tone plan. One or more of the disclosed tone plans may enable puncturing of subchannels while making use of some RUs that would otherwise partially overlap a punctured subchannel in the legacy tone plan.
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公开(公告)号：US20240250788A1
公开(公告)日：2024-07-25
申请号：US18626144
申请日：2024-04-03
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM , Qifan CHEN
CPC classification number: H04L5/0048 , H04W52/18
Abstract: This disclosure provides methods, devices and systems for distributed transmission of short training fields in a power spectral density limited frequency band. In one aspect, a device receives a distributed resource unit (dRU) assignment for transmission of a dRU portion of a physical layer protocol data unit (PPDU); determines a spatial stream global cyclic shift delay (CSD) index for an short training field (STF) of the dRU portion of the PPDU; and transmits, based on the spatial stream global CSD index, the EHT of the dRU portion of the PPDU across a dRU spreading bandwidth associated with the dRU assignment using a tone plan and sequence corresponding to a regular resource unit (rRU) transmission mode.
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Patent Agency Ranking
公开(公告)号：US20240089865A1
公开(公告)日：2024-03-14
申请号：US18454881
申请日：2023-08-24
Applicant: QUALCOMM Incorporated
Inventor： Arjun BHARADWAJ , Rahul TANDRA , Bin TIAN , Youhan KIM , Simone MERLIN , George CHERIAN
CPC classification number: H04W52/242 , H04B7/0452 , H04L1/0009 , H04L5/0053 , H04L27/2601 , H04W52/143 , H04W52/146 , H04W52/228 , H04W52/367
Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, the apparatus is configured to determine a target receiver power level for uplink transmissions received at the apparatus, to determine uplink power control information based on the determined target receiver power level for UL MU-MIMO transmission or UL OFDMA transmission, and to transmit a frame that includes the determined uplink power control information to a station scheduled by the apparatus for uplink transmission.
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公开(公告)号：US20220224579A1
公开(公告)日：2022-07-14
申请号：US17145641
申请日：2021-01-11
Applicant: QUALCOMM Incorporated
Inventor： Alireza RAISSINIA , Bin TIAN , Stephen Jay SHELLHAMMER , Youhan KIM
Abstract: This disclosure provides methods, devices and systems for improving the security of secure long training field (LTF) transmissions. In some implementations, a transmitting device may perform windowing on a secure LTF, in the frequency domain, so that the resulting time-domain LTF signal is difficult, if not impossible, to predict by any device that observes a portion of the LTF signal. In some aspects, the transmitting device may negotiate the windowing of secure LTFs with a receiving device based on fine timing measurement (FTM) negotiation frames exchanged at the start of an FTM procedure. In some other aspects, the transmitting device may dynamically or adaptively perform windowing on secure LTFs. In such aspects, the transmitting device may indicate whether windowing is performed on a secure LTF based on information carried in a signal field of a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF.
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公开(公告)号：US20220159673A1
公开(公告)日：2022-05-19
申请号：US17581735
申请日：2022-01-21
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Stephen Jay SHELLHAMMER , Alfred ASTERJADHI , Dung Ngoc DOAN , Bin TIAN , Youhan KIM
Abstract: This disclosure provides systems, methods and apparatuses for data retransmissions in a wireless network. In some implementations, a wireless communication device may transmit a first data unit to a receiving device, may receive a first hybrid automatic repeat request (HARQ) feedback frame indicating that a portion of the first data unit was not successfully decoded by the receiving device, may retransmit the indicated portion of the first data unit to the receiving device in response to the first HARQ feedback frame, and may transmit a second data unit, different than the first data unit, to the receiving device concurrently with the retransmission of the indicated portion of the first data unit.
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公开(公告)号：US20210409249A1
公开(公告)日：2021-12-30
申请号：US17356330
申请日：2021-06-23
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Bin TIAN , Youhan KIM , Cheng-Ming CHEN
Abstract: A technique for wireless communication of a punctured null data packet with a long training field sequence is disclosed. The long training field (LTF) sequence is generated for the null data packet (NDP) for transmission over a channel having a bandwidth that is an integer multiple of 80 MHz. The LTF sequence is modulated onto a plurality of tones of the channel excluding tones within a punctured subchannel of a plurality of subchannels of the channel. The modulation may be based on a size and location of the punctured subchannel and a symbol duration associated with transmitting the LTF sequence. The NDP is transmitted including the LTF sequence to a second wireless communication device via the channel. A partial bandwidth feedback may be received in response to the LTF in the punctured NDP.
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20.发明申请公开(公告)号：US20190007180A1
公开(公告)日：2019-01-03
申请号：US16022250
申请日：2018-06-28
Applicant: QUALCOMM Incorporated
Inventor： Kai SHI , Bin TIAN , Youhan KIM , Rashmi NANDA , Lochan VERMA , Ning ZHANG
IPC: H04L5/00
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for sub-channel selection in a wireless network. In one aspect, a first message is generated at a first electronic device of a wireless network in response to a number of electronic devices of a wireless network being less than a threshold number. The first message indicates particular sub-channels of a transmission band that are to be used for a transmission in a single user (SU) mode of operation to a second electronic device of the wireless network. The method further includes sending the first message to the second electronic device. The first message indicates that a second message is to be sent to the second electronic device using the particular sub-channels. The method further includes sending the second message to the second electronic device via the transmission using the particular sub-channels.
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